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相关概念视频

Real Time RT-PCR02:57

Real Time RT-PCR

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Real-time reverse transcription-polymerase chain reaction, or Real-time RT-PCR, is an analytical tool used to determine the expression level of target genes. The method involves converting mRNA to complementary DNA with the help of an enzyme known as reverse transcriptase, followed by the PCR amplification of the cDNA. These two processes can be performed simultaneously in a single tube or separately as a two-step reaction.
The real-time quantification of the number of amplified products is...
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Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples
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一个定量PCR检测非毒性Clostridioides difficile.

Khurshida Begum1, Hubert C Chua1, M Jahangir Alam1

  • 1Department of Pharmacy Practice and Translational Research, University of Houston College of Pharmacy, Houston, Texas, USA.

Microbiology spectrum
|December 11, 2024
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概括

一种新的qPCR试验可以检测非毒性Clostridioides difficile (NTCD) 菌株,这可能会防止C. difficile感染 (CDI). 这种测试在7%的住院患者中确定了NTCD殖民,有助于诊断和抗菌药物管理.

关键词:
克洛斯特里迪奥伊德斯困难菌诊断 诊断 诊断 诊断 诊断没有毒性,无毒性.这是管家的管理.

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科学领域:

  • 微生物学 微生物学
  • 分子诊断学 分子诊断学
  • 传染性疾病 传染性疾病

背景情况:

  • 目前用于Clostridioides difficile感染 (CDI) 的诊断没有识别非毒性C. difficile (NTCD) 菌株.
  • NTCD殖民可能会对CDI产生保护,但由于诊断局限性,其患病率尚不清楚.

研究的目的:

  • 开发和验证用于特定检测NTCD的分子试验.
  • 评估在接受CDI检测的住院患者中NTCD殖民的流行率.

主要方法:

  • 设计了一种定量PCR (qPCR) 试验,使用针对NTCD独特区域的特定原料和探针.
  • 用参考菌株验证了试验的分析灵敏度和特异性.
  • 分析了95个临床便样本,以确定针对CDI测试的患者的NTCD患病率.

主要成果:

  • 开发的qPCR试验显示出高分析灵敏度 (线性在3x10^1和3x10^6gDNA之间,R^2=0.999).
  • 在20%的样本中检测到NTCD是GDH酶阴性,在8.7%的样本中检测到GDH酶阳性.
  • 该试验在整体住院患者队列的7%中发现了NTCD殖民.

结论:

  • 一种新的qPCR测定有效地识别NTCD菌株,使其能够在临床样本中检测到.
  • 在大量住院患者中存在NTCD殖民,这表明它可能对CDI起着保护作用.
  • 这种测试对改善CDI诊断,感染控制和抗菌药物管理策略具有重大意义.